March 2004
P h o n e : ( 5 8 5 ) 4 2 6 - 0 9 9 0
w w w . j e s c o a m e r i c a . c o m
F a x : ( 5 8 5 ) 4 2 6 - 4 0 2 5
PP 6.7
SD 6.7
Disassembly & Cleaning of Check
Disassembly & Cleaning of Check
Disassembly & Cleaning of Check
Disassembly & Cleaning of Check
Disassembly & Cleaning of Check
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Please refer to drawings below.
1. Adjust stroke length knob to 0%.
2. Shut off pump and close shutoff valves in the
suction and discharge lines. Relieve system
pressure. Drain suction and discharge lines if
possible.
Caution:
Caution:
Caution:
Caution:
Caution:
Pressure must be relieved
Pressure must be relieved
Pressure must be relieved
Pressure must be relieved
Pressure must be relieved
before proceeding. If pressure is not
before proceeding. If pressure is not
before proceeding. If pressure is not
before proceeding. If pressure is not
before proceeding. If pressure is not
relieved, dangerous chemical spray may
relieved, dangerous chemical spray may
relieved, dangerous chemical spray may
relieved, dangerous chemical spray may
relieved, dangerous chemical spray may
result.
result.
result.
result.
result.
3. Disconnect suction and discharge connections
from pump head.
4. Refer to the appropriate check valve part
drawing. Remove slotted locking screw by
turning counterclockwise using a large flat
bladed screwdriver. Using a tool such as a drift
punch, carefully push all the internal compo-
nents out of the check valve body.
Operation & MaintOperation & MaintOperation & MaintOperation & MaintOperation & Maint
enance Insenance Insenance Insenance Insenance Ins
tructions tructions tructions tructions tructions
MA
GDOS DEDX
5. Inspect balls, seats and ball guides for wear. If
excessive wear is noted, replace parts. Clean
all parts using an appropriate cleaning fluid.
6. Replace all seals.
7. Reassemble check valves, noting orientation
of the internal parts. Replace locking screw.
8. Test check valves for leaks by placing on a flat
surface with check valve seats down as shown
in the parts list drawing. Pour a small amount
of water into the top of each check valve. If
water leaks out of the bottom of the check
valve, disassemble the check valve and clean
or replace the balls and seats.
9. Reassemble check valves to pump head after
installing new seals between check valves and
head. Ensure that check valves are oriented
correctly in the pump head.
10. Reassemble suction and discharge lines, open
shutoff valves and start pump according to
Start Up and Operation Instructions. See page
1.4. Do not overtighten plastic fittings.
